Matrix molding device



A. E. MARKWELL. MATRIX MOLDING DEVICE. APPLICATION FILED MAR. 6, I919.

1,328,050. Patented Jan. 13, 1920.

NDREwEmm ANDREW E. MARKWELL,

or FORT WORTH, TEXAS, ASSIGNOR, or ONE-HALF To s. o

EVANS, or FoRT woRTn, TEXAS.

MATRIX MOLDING DEVICE.

Specification of Letters Patent.

Passed-J3... 13, 1920.

Application filed. March 6, 1919. Serial No. 280,998.

To all whom it may concern:

Be it known that 1, ANDREW E. MARK- WELL, a citizen of the United Statesof America, residing at Fort Worth, in the county of Tarrant and Stateof Texas, have invented certain new and useful Improvements in MatrixMolding Devices, of which the following is a specification.

My invention relates to matrix molding devices, and the object is toprovide simple devices or improvements in matrices of standard size andadaptation for use in linotype and other line casting machines forpreparing the operating edges of printers slugs for holding cross-rules.Other objects and advantages will be fully explained in the followingdescription and the invention will be more particularlypointed out inthe claims.

Reference is had to the accompanying drawings which form a part of thisapplication. v I Figure 1 is aside elevation of a matrix with theimprovements applied thereto. Fig. 2 is a sideelevation of a matrix,showing the recesses cut in the body thereof for receiving theattachments. Fig. 3 is a vertical cross-section of the attachments. Fig.4 is a portion of a slug on an enlarged scale, showing the slot or notchtherein made by the improved matrix and showing the re taining device inone wall of the slug. Fig. 5 is a side elevation of matrix and former,showing a slight variation in the means for holding the former in place.Fig. 6 is a side elevation of a matrix and former showinga variation inthe former. Fig. 7 is a vertical section of the former shown in Fig. 6.

Similar characters of reference are used to indicate the same partsthroughout the several views.

For illustration of the improvements, a matrix-1 of standard size andadaptation is shown. A slot 2 of irregularconfiguration is madethroughthe body of the matrix for an operating spring 3 and the-shank end A ofthe former. The former has a hook 5 on the lower end for engaging thespring 3. The matrix 1 has a vertical groove 6 therein for receiving andguiding the former. The former is held against displacement by a thinbar 7 which is placed in a horizontal groove 8 and soldered therein orotherwise attached thereto. The spring 3 has a shank the former willmake ribs inserted in a slot 9 in the matrix and the other end of thespring is caught in the hook 5 of the forming device. The operating endof the former isthick for two purposes,- one to make the former rigidand the other to make the former thick enough to provide a curved groove10 therein for performing the function intended. The object of thegroove 10 is to cast a rib 11 on one of the walls of the slot in theslug 12. I

This invention is for use in making the slugs described in my pendingapplication filed Oct. 2,1918, Ser. No. 256,510.

In operation, the matrix 1 is so located in the mold that a slot will beformed in the slug as the slug is cast. The former constitutes a part ofthe matrix for making the slot and a portion of the molten metal willfill the groove 10 in the former. When the slug is formed, it will bewithdrawn from the matrix and on account of the rib 11 occupying thegroove 10, the former will be drawn out with the slug until the shoulder13 passes above or away from the matrix. The thin portion of the formerwill yield or bend and allow the rib 11 to pass on away with the slug.As soon as the rib 11 leaves the groove 10, the former will be drawnback into operative position by the spring 3. The upper part of theformer cooperates with the matrix to form the slot 1 1 in the matrix.

In the former shown in Fig. 5, a slot 16 is made in the former and aheaded brad or screw bolt 17 holds the former in place during itstransverse movements.

In the former shown in Figs. 6 and 7 ,a former 18 is shown in the formof a U-shaped spring with cavities 19 in each side so that 11 in bothwalls of the slot in the slug. The arms of the former are dovetailedinto the matrix in grooves on each side of the matrix and a bridge 20 ofthe matrix will prevent the former from leaving its seat. When the slugis drawn from the matrix, the arms of the former 18 will yield towardeach other far enough to let the ribs 11 slip out of the cavities 19.

What IOlELiHl, is,-

1. A matrix molding device for forming slots in a slug-comprising amatrix having a vertical groove in the side thereof and a former 7having its operating end thick enough for normally filling said grooveand movable therein and provided with a curved groove in its outer facenear said operating end for forming a rib on one of the vertical wallsof said slot.

2. A matrix molding device for forming slots in a slug comprising amatrix having a vertical groove in the side thereof and a former havingits operating end thick enough for normally filling said groove andmovable therein and havin a portion of the body of the former thin foryielding over the edge of the matrix as the matrix is being withdrawnfrom the slug and pro vided with a curved groove in its outer face nearsaid operating end for forming a rib on one of the vertical walls ofeach slot.

3. A matrix molding device comprising a matrix having a vertical groovein one side thereof, a spring metal former normally filling said grooveand movable therein and provided with a third groove in 'ts outer facenear its operating end, and a retractile spring connected with saidformer for drawing the former back to operative position.

4:. A matrix molding device for forming a slot in a slug comprising amatrix having a vertical groove in one side thereof and a slottherethrough below said groove, a former normally filling said grooveand movable therein and projecting down in said slot and provided with acurved groove in its outer face near its operating end to form a rib onone of the vertical walls of said slot, a retractile spring mounted insaid slot and connected with said former, and a bar mounted in the sideof said matrix to prevent displacement of said former.

5. A matrix molding device comprising a matrix having a vertical groovetherein in one side, a former having a thicker portion normally fillingsaid groove for 00- operating with said matrix for forming a slot in aslug and having a curved groove in the outer face thereof for forming arib on one of the vertical walls of said slot and having the edge of thematrix when the thicker portion is drawn from the matrix, and means forholding said former in place and for drawing the former back to normalposition.

6. A matrix for forming a slot in a slug, a former countersunk thereinand movable transversely thereof, means for holding said formeryieldingly in its normal position and for drawing the former back tonormal position after an operation, said former having a curved groovein its outer face near its operating end for making a curved rib on oneof the vertical Walls of said slot, and means for preventing lateraldisplacement of said former.

In testimony whereof, I set my hand, this etth day of November, 1918.

ANDREW E. MARKWELL.

a thinner portion for yielding over.

